<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .father {
            overflow: hidden;
            width: 300px;
            height: 300px;
            margin: 100px auto;
            background-color: pink;
            text-align: center;
        }
        
        .son {
            width: 200px;
            height: 200px;
            margin: 50px;
            background-color: purple;
            line-height: 200px;
            color: #fff;
        }
    </style>
</head>

<body>
    <div class="father">
        <div class="son">son儿子</div>
    </div>
    <script>
        var f = document.querySelector('.father');
        var s = document.querySelector('.son');
        s.addEventListener('click', function(e) {
            alert('son');
            e.stopPropagation();
        })
        f.addEventListener('click', function(e) {
            alert('father');
        })

        document.addEventListener('click', function() {
            alert('document');
        })
    </script>
</body>

</html>